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Micrographs of haematoxylin and eosin–stained CCA after FFA. No stenosis was apparent in CCA of the sham group (left); an obvious stenosis was present in CCA of the BCCAO group (middle; CCA ligated by a 0.6-mm needle; right: CCA ligated by a 0.4-mm needle) with red blood cells in the lumen.
